galena a mineral of lead is a compound of the metal with sulfer. Analysis shows that a 17.74 g sample of galena contains 2.39 g of sulfer a.) Calculate Mass of lead b.)Mass Fractions of lead and sulfer in galena. Calculate to three significant figures mass fraction of Pb: Mass fraction of S: c.) Mass percents of lead and sulfer in galena. Calculate to three significant figures  Mass % of Pb: Mass % of S:

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.